Shaving apparatus



May 12, 1953 J. A. G. MALMBERG 2,637,902

sHAvING APPARATUS Filed Deo. 27, 1950 2 Sheets-Sheet l 500) I; um' u +Mw wai/V513 May 12, 1953 J. A. G. MALMBl-:RG

SHAVING APPARATUS 2 Sheets-Sheet 2 Filed Dec. 27, 1950 fra/072V @www M, M valalhw Patented May 12, 1953 .lonas ke Gregorius Malmberg,

Stockholm, `Sweden ,application December 27, 1950, serial No. 202,843-

In Sweden November 22, 1950 The present invention relates to an improvement in such shaving-apparatus having a nely slitted rotatably mounted drum and a xed knife applied inside and in the longitudinal direction of the said drum, and the object of the invention is to obtain an effective operating and durable shaving apparatus of this type, the invention being chiefly characterized by an open-ended casing provided with a longitudinal slot and arranged inside the drum for the purpose of guiding the same and connected with a handle, the one of the longitudinal edges of the slot in the casing being provided with a longitudinal groove for inserting an exchangeable knife, and movable locking means which in the locking position cooperate with the ends of the knife in order to keep the knife fixed in the longitudinal direction and also crosswise.

This arrangement thus renders it possible to use exchangeable knives which, after being inserted in the groove in the one edge of the slotted casing is firmly locked by the locking means.

According to the invention, the ends of the casing can be connected with the branches of a U-shaped frame belonging to the handle, these branches being provided with openings corresponding to the open ends of the casing, so that the knife may be easily removed at the same time as the interior of the shaving-apparatus is easily accessible for cleaning.

Other features of the invention will in the following be more closely described in connection with the accompanying drawings.

Figs. l and 2 show the apparatus when folded up and seen from the side and from below, re-

spectively, whereas Fig. 3 is a section according to the line Ill-Ill in Fig. l.

Figs. 4 and show from the side and from below, respectively, the apparatus when opened up, whereas Fig. 6 is a section of the apparatus in open state, corresponding to Fig. 3.

Figs. 7, 8 and 9 illustrate different embodiments of the knife.

Fig. 10 shows, in a larger scale, the apparatus in end view, when folded up, while Fig. 1l shows the apparatus in the same View, but with the locking means of the knife in an unlocking position.

Fig. 12, finally, is a section seen from line XBL-XII in Fig. 3 and in a larger scale.

The shaving-apparatus contains a U-shaped frame with a central part I and branches 2, 3 protruding from the ends thereof, serving as brackets for an open-ended casing 4a, 4b, which is cut up longitudinally for obtaining a slot and s claims. (c1. 304-43) 2 at the ends provided with protruding laps 5, which extend into corresponding openings in the y branches 2, 3.

Around the casing 4a, 4b, thus rmly attached to the branches 2, 3 of the frame, a finely slitted drum 8 is loosely applied, which with some clearance is freely turnable around the casing, which consists of two cylindrically bent plates ta and 6b, the one within the other. Along one of the longitudinal slot-edges of the casing there is a groove 9 for the knife I0. This groove 9 can for example be milled but it can also, as shown in the drawing, be obtained by bending the plates 4a, 4b somewhat from each other as shown in Fig. 11 on the drawing. Furthermore, locking means I3 are pivotally mounted around a shaft II fixed in the branches 2, 3 of the frame, and around this shaft II and another shaft I2 there are also pivotally mounted two handles I4 which, when folded up around the drum 8, also serve as protecting plates.

According to the embodiment illustrated in the drawings the locking means I3 consist of two cover-shaped parts, each one at its underside being provided with a ledge I5, which are so arranged that, when the cover-shaped locking means I3 have been turned upon the shaft II in locking direction, the said ledges I 5 cooperate with the ends of the knife Ill, said ends for this purpose being provided with shoulders I6, protruding somewhat beyond the ends of the casing 4a, 4b, so that the knife I Il, resting in the groove 9, is prevented from being displaced in the 1ongitudinal direction as well as crosswise.

As seen on the drawing, the two locking means I3 are suitably joined with one another by means of a longitudinal bar I3.

The handles I4 are as already stated, pivotally mounted around the shafts Il and I2, which extend between the frame-branches 2, 3, so that a good and reliable bearing is secured. In order to obtain a resilient holding of the handles Il, when they are in folded-up position, enclosing the drum 8, the central part I of the U-shaped frame is made comparatively narrow and like a rod, so that a groove-shaped, resilient plate il can be applied over the central frame part i, the edges I'Ia, I'Ib of which plate cooperate with the hinge-parts I8 of the handles I4. These hinge-parts I8 are provided with a projection I8, protruding at a somewhat greater radial distance from the shafts II, I2, so that when folding up the handles I4, a certain resilient snaplocking eect is obtained in cooperation with tbe plate edges I'Ia, I1b.

The handles I4 and the locking means i3 can oi course be constructed in many other ways.

Having now particularly described the nature of my invention and the manner of its operation, what I claim is:

l. In a dry shaver of the type including a rotary slitted drum and an interior xed blade in shearing relation thereto, a support for said blade comprising a longitudinally slotted 'openended hollow cylindrical casing disposed Within said drum, a longitudinal edge of said casing being formed to provide a relatively deep and nairrow groove adapted to receive and position said blade with its cutting edge contacting the .inner surface of said drum, a fra-me supporting said Y casing in xed relation thereto, and means pivotally mounted on said frame on 'anaxisparallel to the longitudinal axis of said casing "and swingable to a position closingl both endsof 'said casing, thereby retaining said blade against longitudinal displacement.

2. A dry shaver according to claim l, including a pair of cover plates pivoted on said frame on axes parallel to and on opposite sides of a plane extending centrally through said frame and containing the longitudinal axis of said casing, said plates serving in one terminal position to cover said drum and in the other terminal position to form a handle for the shaver.

3. A dry shaver according to claim 2, including resilient means acting between said frame and said plates and serving to urge them toward their first-named terminal position.

JONAS KE GREGORIUS MALMBERG.

Name Date Arey Oct. 12, 1943 Number 

